[RFI] RFI & Theft Issues re. RFID in Blink Credit Cards?

[kd4e]

We just received replacement credit cards yesterday with the
"Blink" RFID chips in them.

My understanding of RFID is that they are a passive transceiver
with the transmitter activated by an RF field to send the credit
card number.

The whole idea troubles me as I am guessing it will be cracked
and add yet another way to steal credit card numbers.

Anyone tested one of these things?

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Thanks! & 73, doc, KD4E
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